Beckett SM User Manual
Page 15
15
SF/SM Burner Manual
RECYCLE. If the fl ame is lost while the burner is
fi ring, the control shuts down the burner, enters
a 60 second recycle delay, and then repeats the
above ignition sequence. If fl ame is lost three
times in a row, the control locks out to prevent
cycling with repetitious fl ame loss due to poor
combustion.
BURNER MOTOR-OFF DELAY. The fuel valve
is closed and the burner motor is kept on for the
selected motor-off delay time before the control
returns the burner to standby.
7.
8.
Figure 10. Typical Burner Wiring & Burner Sequence of Operation for R7184 Control.
Refer to the appliance manufacturer’s wiring diagram for actual specifi cations.
STANDBY. The burner is idle, waiting for a call for
heat. When a call for heat is initiated, there is a 3-
10 second delay while the control performs a safe
start check.
VALVE-ON DELAY. The ignition and motor are
turned on for a 15 second valve-on delay.
TRIAL FOR IGNITION (TFI). The fuel valve is
opened. A fl ame should be established within the
15 second lockout time.
LOCKOUT. If fl ame is not sensed by the end
of the TFI, the control shuts down on safety
lockout and must be manually reset. If the control
locks out three times in a row, the control enters
restricted lockout.
IGNITION CARRYOVER. Once fl ame is
established, the ignition remains on for 10
seconds to ensure fl ame stability before turning
off. If the control is wired for intermittent duty
ignition, the ignition unit stays on the entire time
the motor is running.
RUN. The burner runs until the call for heat is
satifi ed. The burner is then sent to burner motor
off delay, if applicable, or it is shut down and sent
to standby.
1.
2.
3.
4.
5.
6.
Feature
Interrupted
ignition
Limited reset,
Limited recycle
Valve-on
delay
Burner motor off
delay
Alarm
Contacts
R7184A
YES
YES
—
—
—
R7184B
YES
YES
YES
—
—
R7184P
YES
YES
YES
YES
Optional
Control System Features
VALVE-ON
DELAY
STANDBY
TRIAL FOR
IGNITION
IGNITION
CARRYOVER
RUN
LOCKOUT
RECYCLE
MOTOR-OFF
DELAY
1
2
3
4
5
6
8
7
Section: Burner Controls